Giúp mình với ạ, kèm lời giải thích, nếu không giải thích được thì không cần trả lời. Mark the letter A, B, C, or D to indicate the correct response to each of the following exchanges. 1. “It's so stuffy in here." – “____” A. Do I have to open the window? B. Must I open the window? C. Shall I open the window? D. Would you like to open the window? 2. “Merry Christmas!" – “____” A. Happy Christmas to you! B. Same for you! C. The same to you! D. You are the same! 3. "I will pick you up around 7:30. The movie starts at 8:00." – “____” A. No, you don't B. OK. See you then. C. I don't like waiting. D. Thanks, no big deal. 4. "____ going on a picnic this weekend?" - "That's great!" A. How about B. Let's C. Why don't we D. Would you like 5. "Mr Green had an accident. He's been in hospital for a week.” – “____” A. How terrific B. Oh, is he? C. Poor it. D. Poor him.